Milk-sediment tester.



W. WINDER & H. McNALLY.

MILK SEDIMENT TESTER. APPLICATION FILED AUG-9, I911.

Patented Apr. 30, 1918.

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specification ot Letters Patent. Pg tmmtpfl App; 311% ypy,

application filed n w a roar. serial no. nearer.

. have invented a new and usefulh/lilk-Sediment Tester, of which the following is a specification.

The device forming the subject matter of this application is adapted to. be employed for determining the amount of sediment in milk and like liquids.

The invention aims to improve the construction of a piston which, working. within a receptacle, .constitutes a means whereby the sediment may be removed \for examination.

It is within the province of' the dis closure to improve generally and to enhance the utility of devices of that type to which the present invention appertains.

With the above and other objects in view which will appear as the description proceeds, the invention'resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise emboent of the invention herein disclosed can be made within the scope of what is claimed, without departing from the spirit of the inven- I tion. a

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t t numeral 3 and is rovided with a peripheral in the accompanying drawings 1B igure 1 shows in longitudinal section, a tester constructed/in accordance with the in vention";

lBi 2' is a longitudinal section: showing the plston, the cutting planein Fig. 2- being at riht angles to the cutting plane in ig. 3' is a section on the line 3-3 of llifi l.

ca there is provl ded. a cy .1 cal receptacle 1 which may lee-made of an desired material. vlgf the receptacle 1 is ma e'of glass, itmay e wit various receptacles for chemical work and other purposes. The receptacle 1 jreferalbly has a coon internal diameter h om its bottom to a. point adjacent its top,- the receptacle 1 being flared at its upper end as sho at 2, to facilitate the introduction of'the piston into the receptacle. r

The piston is denoted generally by the out the resent invention aduated longitudinally, as is coon groove 4k in which is seated a packing ring 5, adapted to have close sliding contact with proyecting from the concaved face 7 of the' piston, the upper surfaces of the bosses 8 being disposed at right angles to the axis of the piston.

Any suitable means may be provided for. raising and lowering the piston 3. In the presentv instance, a ll-shaped bail 9 is provided for this purpose, the lower ends of the bail 9 passingremovably through the bosses 8 and the piston 3. Lower nuts 10 are threaded onto the ends of the bail 9 and bear against the under, surface of the piston 3. Upper nuts 11 are threaded onto the ends of the bail and coact with the upper faces of the bosses 8 on the piston '3, the bail 9 being securely attached in. this manner to the piston 3. A ti -shaped hanger 12 is mounted in the piston 3 and. depends below the lower face of the piston. The numeral it marks a closure for the opening 6, the closure being in the form of a ring, of somewhat larger diameter than the opening 6, so as to blnd against the lower surface of the piston 3 a 'filter 17 which is interposed between the c oiston,

eye l5 engaged with the hanger 12, so that,

the closure may be s'wun toward and away from the piston 3, to facllitate the introduction and removal of the filterl'l'. The closure 14L includes a fine mesh screen 16 extended beneath the filter l7 and constituting a means for supporting the filter below the opening 6 in the piston 3. The closure it is sup lied with a projecting keeper 118, the end 0 which is ted as shown in the dra w the under sideof the piston having'a seat 20 in which the keeper 18 of the closure is received. A pivot element 21 is mounted in the piston 3 and on the pivot clent is mounted to swing, in a direction 16 serving to support the filter. The latch 22 is engaged with the keeper 18 and thus the closure 14 and the filter 17 are held in place. Because the keeper 18 is so constructed that it will fit in the seat 20 of the piston 3, the latch 22will engage readily with the keeper when the latch is vswung on its pivot element 21.

In practical operation, the piston 3 is pushed to the bottom of the receptacle 1 by means of the bail 9, and the milk or other liquid to be tested is deposited in the receptacle. After the sediment has settled, or even before the sediment has settled, in some instances, the piston 3 may be pulled up-. wardly by means of the bail 9. Since the ring 5, bears air-tight on the inner surface of the receptacle 1, a artial vacuum will be created beneath the plston 3 as the latter is raised, the liquid, as a consequence, drawn dow nwardly through the filter 17 and the screen 16, the concavity 7 of the piston 3 serving to aid in depositing the sediment in the opening 6, ,and consequently on the filter 17. I

When the piston 3 is removedfrom the receptacle 1; the sediment will be found col-' lected on the filter 17, and the filter may be being Y removed by disengaging the latch 22 from the keeper 18 of the closure 14 and by swinging the closure away from the piston 3 on the hinged connection 15l2.

Having thus described the invention, what is claimed is 1. A milk sediment tester comprising a receptacle; a piston movable therein and having an opening; a foraminous closure for the opening; means for securing the closure movably to the piston; and a filter extended across the opening, the filter being bound between theclosureand the piston.

2. In a milk sediment tester, a receptacle; a piston movable in the receptacle, the piston having an opening, and having a slanting upper face. cooperating with the opening; a packing ring mounted on the periphcry of the piston and coacting with the re- I the piston; and a filter extended across'the opening and supported by the foraminous member.

In testimony that we claim the foregoing as our own, we have hereto afiixed our signatures in the presence of two witnesses.

WILLIAM WINDER. HUGH MoNALLY.

Witnesses:

WILLIAM NrsBE'r,

J. Drum; 

